[2/3] update openapi spec: generate code

This updates the openapi spec and invokes the code generator to update
to the Jellyfin 10.10.6 API.

A big motivation to do this was because some mandatory fields have been
made obsolete and are no longer included in responses. Sailfin tries to
deserialize these mandatory fields and fails deserializing. It was evident
in the list of sessions to control.

The failing was a bit too gracefully in my opinion, it did not even show
that an error occurred, nor was it logged anywhere. It took some time
to debug.

core/include/JellyfinQt/dto/groupinfodto.h

@@ -52,8 +52,10 @@ namespace DTO {
 class GroupInfoDto {
 public:
 	GroupInfoDto(	
-		QString groupId,					
-		GroupStateType state,					
+		QString groupId,			
+		QString groupName,			
+		GroupStateType state,			
+		QStringList participants,			
 		QDateTime lastUpdatedAt		
 	);
 
@@ -86,8 +88,6 @@ public:
 	* @brief Gets the group name.
 	*/
 	void setGroupName(QString newGroupName);
-	bool groupNameNull() const;
-	void setGroupNameNull();
 
 
 	GroupStateType state() const;
@@ -102,8 +102,6 @@ public:
 	* @brief Gets the participants.
 	*/
 	void setParticipants(QStringList newParticipants);
-	bool participantsNull() const;
-	void setParticipantsNull();
 
 	/**
 	 * @brief Gets the date when this DTO has been created.